class_docstr: Represents a config parameter.
  
  A config parameter has a name, a default value, a type,
  a category, a documentation, an optional longer documentatation
  and an optional subtype for list style option.
  
  Most of these informations are used in cabaret to auto generate
  forms representing these options.
docstr: Return `True` if this parameter is a boolean
docstr_tok: ["Return","`","True","`","if","this","parameter","is","a","boolean"]
code: def is_boolean(self):
      """Return `True` if this parameter is a boolean"""
      return self.type == bool
  
imports: from copy import deepcopy
  from pygal import formatters
  from pygal.interpolate import INTERPOLATIONS
  from pygal.style import DefaultStyle, Style
label_desc: Use image node_id 3 for calling the Key obj's underlying member method code with example usage: obj.is_boolean() and returns: unknown